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《Chinese Journal of Geophysics》 2003-01
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ATTENUATION OF GROUND MOTION AND SITE RESPONSEIN GUANGDONG REGION

WONG YUKLUNG 1 ZHENG SIHUA 2 LIU JIE 2 ZHAO XINGQUAN 3 KANG YING 41 Department of Civil and Structural Engineering, Hong Kong Polytechnic University,China2 Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036,China3 Institute of Geological and Nuclear Science, Gracefield, Lower Hutt, New Zealand4 Seismological Bureau of Guangdong Province, Guangzhou 510070,China  
Based on 249 horizontal-component digital seismograms recorded on 14 stations of Guangdong Telemetered Network, the attenuation of ground motion and site response of each station is investigated. Assuming a trilinear geometrical spreading model, we obtained the attenuation function in Guangdong region. The same dataset also used tried to fit both linear and bilinear geometrical spreading models. The comparison of the residuals of the results for these models shows that the residual is biggest for linear model, medial for bilinear model, and the smallest for trilinear model. It is suggested that the trilinear geometrical spreading model is reasonable and suitable for Guangdong region. The frequency-dependent Q in the Guangdong region is estimated as Q(f)481.5·f 0.31. The site responses do not show significant amplifications, which is consistent with their basement on rocks.
【Fund】: 香港理工大学项目资助
【CateGory Index】: P315
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